التفاصيل البيبلوغرافية
| العنوان: |
Nano-silver incorporated amine functionalized graphene oxide titania nanotube composite: a promising DSSC photoanode. |
| المؤلفون: |
Kandasamy, M., Selvaraj, M., Alam, M. Mujahid, Maruthamuthu, P., Murugesan, S. |
| المصدر: |
Journal of the Taiwan Institute of Chemical Engineers; Feb2022, Vol. 131, pN.PAG-N.PAG, 1p |
| مصطلحات موضوعية: |
GRAPHENE oxide, DYE-sensitized solar cells, TITANIUM dioxide, NANOTUBES, ELECTRON-hole recombination, TRANSMISSION electron microscopy |
| مستخلص: |
• TiO 2 NTs-GO/NH 2 /Ag nanocomposite was prepared by a facile method. • The nanocomposite owns large surface area of 137 m2/g and high dye sorption ability. • New nanocomposite based photoanode shows photoconversion efficiency of 8.18%. • Amine functionalization and Ag NPs incorporation synergistically reduce R CT. • Ag0 and –NH 2 incorporation in TiO 2 NTs-GO effectively increase the e- transport. In dye-sensitized solar cell (DSSC), the semiconductor photoanode plays a vital role in gathering photo-excited electrons from the sensitizer. Generally, the photoconversion efficiency of photoanode is hampered by electron-hole recombination. To circumvent this, modification of TiO 2 nanotubes with amine functionalized graphene oxide (GO) has been attempted. Nanocomposites consisting of ethylenediamine functionalized graphene oxide (GO/NH 2) and titania nanotubes (TiO 2 NTs) are prepared by hydrothermal method and are incorporated with 3 wt% of Ag nanoparticles. The nanocomposites are studied using diffuse reflectance spectroscopy, Raman spectroscopy, XRD, TEM and XPS techniques. The GO surface acquire defect structure and disorder after amine functionalization which occurs via reactive oxygen groups to form C−N bond. The nano-silver incorporated amine functionalized GO modified TiO 2 nanotubes (TiO 2 NTs-GO/NH 2 /Ag) exhibit high dye adsorption capacity and leads to more light gathering. The DSSC fabricated with TiO 2 NTs-GO/NH 2 /Ag photoanode exhibits very good photo-conversion efficiency (8.18%). Significant light-to-electrical energy conversion efficiency of the TiO 2 NTs-GO/NH 2 /Ag photoanode DSSC is due to the efficient charge transport at the interfaces, high dye loading and broad absorption by the sensitizer adsorbed TiO 2 NTs-GO/NH 2 /Ag thin-film. Possible mechanism of electron transport in TiO 2 NTs-GO/NH 2 /Ag photoanode. [Display omitted] [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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